只是一道發光的彩虹。 Just a glowing rainbow.
我們來畫一道發光的彩虹。 



使用大筆尖時,顏色會變得不平滑。像這樣。

我建議搭配高斯模糊來使用。在使用高斯模糊之後。

Let's draw glowing rainbow. 



When using the large tip size, the colour will become not smooth. Like this.

I recommended using it with Gaussian blur. After using Gaussian blur.
